These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

This golf ball–shaped former desert real estate office now houses a UFO museum.

The cinder cone volcano with a less than complimentary name.

A mysterious spirit totem at the edge of Navajo lands.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

A stealthy Apache hideaway that became the haunting site of a mass grave.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancient pueblos built into the base of a natural canyon wall.

An artificial crater field that trained astronauts for lunar exploration.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

A memorial to the firefighters who died in an industrial disaster is housed in a small public park.

An ode to one of the dirtiest jobs during the construction of the Boulder Dam.

These markers are used to document elevation changes around the famed dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

This elaborate towering structure was once famed for its revolutionary height.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.